What To Do If An Error Occurs; When Transmission Error Occurs (Com.led Of Fp7 Mw Unit Turns Off)8-8; When Err Led On Fp7 Mw Unit Turns On; When Err Led On Fp7 Mw Unit Is Flashing - Panasonic FP7 User Manual

Troubleshooting

8.4 What to Do If an Error Occurs

8.4.1 When Transmission Error Occurs (COM.LED of FP7 MW Unit Turns Off)
 Situation
A transmission error may have occurred.
 Procedure (1)
Check to make sure the transmission cables have been connected between the two (+)
terminals, and between the two (-) terminals of the units.
 Procedure (2)
Check if the transmission cables are within the specifications range. Configure all the wiring
systems using the same type of cables. Do not mix different types of cables.
 Procedure (3)
Check the operation monitor LEDS and terminator setting switch on the unit to make sure the
units at the both ends of the network are set as terminal units.

8.4.2 When ERR LED on FP7 MW Unit Turns ON

 Situation
An error may have occurred in the hardware of FP7 MW Unit.
 Procedure
Turn off and on the power, and check again.

8.4.3 When ERR LED on FP7 MW Unit is Flashing

 Situation
Any setting or configuration of the unit may be wrong.
 Procedure
Confirm the position of the unit and error content by using any of the followings.
• System relays (SR), System data registers (SD)
• Status information (such as transmission assurance relay, operation mode relay)
• PMGET instruction
 Procedure
Correct the settings and configuration of the unit.
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